Tuesday, April 1, 2014
8:30 - 12:00

Tuesday, April 1, 2014
13:30 - 17:00

Title: Recent Advances in Wireless Small Cell Networks
Presenters: Mehdi Bennis 
and Walid Saad 

Centre for Wireless Communications, University of Oulu, Finland
Electrical and Computer Engineering Department, University of Miami, USA

Small cell networks (SCNs) are seen as a promising solution for boosting the capacity of wireless networks, while efficiently offloading data and expanding the coverage in a cost-effective manner. In this tutorial, we provide a comprehensive overview on SCNs while highlighting the key challenges, associated techniques, and the future landscape. First, we provide an overview of advanced analytical techniques, such as stochastic geometry, suitable for modeling and analyzing SCNs. We show how these new spatial and random statistical models provide tractable and powerful tools for computing network performance metrics, such as coverage probability and spectral efficiency. Second, we delve into the details of advanced interference management techniques tailored for the unique features of SCNs. In particular, we introduce key concepts such as cell range expansion, cell association, and intercell and interference coordination (ICIC) that lie at the heart of next-generation LTE-Advanced systems. Then, we discuss in detail the concept of self-organizing networks (SONs) and its key role in self-configuring and self-optimizing small cell deployment. Here, we focus on novel game-theoretic and reinforcement learning techniques that are seen as a key enabler for deploying self-optimizing and self-configuring heterogeneous and small cell networks.
Besides, due to its notable importance, we will examine the prospects and challenges of the cellular-WiFi integration and present decentralized offloading strategies that harness their mutual benefits. Finally, another topic related to backhaul offloading is proactive caching, which we will present in great details and its key role in the upcoming 5G networks. We conclude the tutorial by providing an in-depth overview of the current and future challenges facing the large-scale deployment of SCNs, as well as the way forward. 


Title: CMOS Radio Transceiver Chips and Dynamic Spectrum Access
Presenter: Eric Klumperink

This tutorial discusses radio hardware challenges related to dynamic spectrum access (often loosely referred to as “cognitive radio”). The focus is mainly on the analog and mixed analog-digital interface of a transceiver. Cognitive radio asks for new functionality, e.g. spectrum sensing and more agility in the radio transmitter and flexibility in the receiver. Moreover, the technical requirements on the building blocks are more challenging than for traditional single standard applications, e.g. in and width, programmability, sensing sensitivity, blocker tolerance, linearity and spurious emissions. A dynamic spectrum access device ideally adapts itself in a smart way to its radio environment. CMOS IC-technology is the mainstream technology to implement smart signal processing and for reasons of cost and size it is attractive to also integrate the radio frequency (RF) hardware in CMOS. Traditional radio transceiver hardware is highly dedicated, e.g. to a fixed RF band, channel bandwidth and modulation format. In contrast, a cognitive radio asks for a programmable radio, a kind of "software defined radio" (SDR). This tutorial reviews recent research aiming at a CMOS SDR, focusing on the challenging RF and analog baseband part of a SDR receiver and transmitter.
Moreover, spectrum sensing based on cross-correlation energy detection will be addressed. Traditional radio receiver and transmitter hardware is highly dedicated, e.g. to a fixed RF band, channel bandwidth and modulation format. The challenge is to conceive receiver architectures and circuits that can flexibly support a range of RFbands, channel-bandwidths, and modulation types at different sensitivity levels. Several resulting challenges and solutions proposed in recent literature will be addressed. Strong and weak points will be indicated, and feasibility limits will be discussed. Examples of realized chips will be shown, giving an impression on achievable performance. Finally some ideas for future research will be discussed.


Title: Spatial Statistics and Models for Cognitive Radios and Wireless Networks
Presenters: Petri Mähönen and Janne Riihijärvi, Institute for Networked Systems, RWTH Aachen University


It is self evident that the spatial positions of radios have a great effect on the design, performance, and implementation principles of  wireless networks. This is particularly true for cognitive radios and future spectrum efficient networks as we have to consider much carefully aggregate interference and space-time behavior of traffic to model and design such networks.
Recently there has been an increased interest on applying stochastic geometry and spatial statistics to model and analyse different wireless networks. In this tutorial we provide first a general level, and easy to follow, overview on spatial statistics and selected stochastic geometry methods and applicable results.
In the second part of the tutorial we provide more in depth discussion, with practical examples, on spatial statistics, and introduce key concepts and modelling methodologies.
Although part of the tutorial will be mathematically rigorous, we are paying a particular attention to the ensure that especially the first part of the tutorial will be accessible for students and industry engineers, including interested policy track attendees.

Title: A Hands-on Approach to Spectrum Regulation for Innovative Wireless Engineers
Presenters: Nelson Pollack and Michael Marcus

National and international spectrum policy issues are key factors in the practical implementation of innovative wireless technology as spectrum access is highly regulated in all countries. This course, taught by two long time experts in spectrum policy, will review what an engineer working on cutting edge issues needs to know about what is permitted, what may be permitted, and working to push the boundaries of spectrum policy to enable new technology. The focus will be on international spectrum policy and US national policy for both private sector use and federal government use.


Title: Using GNU Radio to Explore the Consequences, Limits, and Behavior of DSA Systems
Presenters: Thomas Rondeau, Ph.D. and Matt Ettus


In this tutorial, we explore a number of features and tools in GNU Radio to help researchers explore the real physical space of DSA systems when transmitting and receiving signals. As dynamic spectrum access concepts are moving from paper to radio experimentation, there are many issues involved that are not always readily apparent or understood. In the GNU Radio project, we have an interest in moving from signals in a computer to signals over the air and so have dealt with concepts of both signal and radio hardware behavior as well as algorithm performance and limitations. We will introduce GNU Radio tools and techniques to help us move to real transmission and reception of signals in non-ideal scenarios as well as explore different signal processing algorithms that can help enable DSA.


Dr. Mehdi Bennis
received his M.Sc. degree in Electrical Engineering jointly from the Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland and the Eurecom Institute, Sophia Antipolis, France in 2002. From 2002 to 2004, he worked as a re-search engineer at IMRA-EUROPE investigating adaptive equalization algorithms for mobile digital TV. In 2004, he joined the Centre for Wireless Communications (CWC) at the University of Oulu, Finland as a research scientist. In 2008, he was a visiting researcher at the Alcatel-Lucent chair on exible radio, SUPELEC. He obtained his PhD in December 2009 on spectrum sharing for future mobile cellular systems. He is currently managing the Broadband Evolved FEMTO (FP7-BeFEMTO) project at the University of Oulu. His main research interests are in radio resource management,  heterogeneous networks, game theory, and machine learning in the context of broad-band wireless communications. Mehdi has published more than 50 research papers in international conferences, journals and book chapters. He is also co-chair of the 1st international workshop on small cell wireless networks (SmallNets) in conjunction with IEEE ICC 2012, and 2nd workshop on cooperative heterogeneous networks (coHetNet) in conjunction with IEEE ICCCN 2012, the 2nd international workshop on small cell wireless networks (SmallNets) in conjunction with IEEE ICC 2013, and the upcoming 3rd international workshop on small cell wireless networks (SmallNets) in conjunction with IEEE ICC 2014. Recently, he gave tutorial presentations at IEEE PIMRC 2012 (Sydney, Sep. 2012) and IEEE GLOBECOM 2012 (Annaheim, CA, Dec. 2012). Yet another tutorial will be given at IEEE WCNC 2014 (Istanbul, Turkey). 

Dr. Walid Saad received his B.E. degree in Computer and Communications Engineering from the Lebanese University in 2004, his M.E. in Computer and Communica-tions Engineering from the American University of Beirut (AUB) in 2007, and his Ph.D degree from the University of Oslo in 2010. From August 2008 till July 2009 he was a visiting scholar in the Coordinated Science Laboratory at the University of Illinois at Urbana Champaign. From January 2011 till July 2011, he was a postdoctoral fellow at the Electrical Engineering Department at Princeton University. He is currently an Assistant Professor at the Electrical and Computer Engineering Department at the University of Miami. His research interests include applications of game theory in wire-less networks, small cell networks, cognitive radio, wireless security, wireless systems (UMTS, WiMAX, LTE, etc.), and smart grids. He has published over 60 international conference and journal articles in these areas. He was the author/co-authors of the papers that received the Best Paper Award at the 7th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt), in June 2009, at the 5th International Conference on Internet Monitoring and Protection (ICIMP) in May 2010, and at the IEEE Wireless Communications and Networking Conference (WCNC) in April 2012. He has been actively engaged in tutorial presentations at flagship conferences this includes recent tutorials at IEEE MILCOM 2012 (Orlando, FL, Nov. 2012) and IEEE GLOBECOM 2012 (Annaheim, CA, Dec. 2012). Dr. Saad is a recipient of the NSF CAREER award in 2013 for his work on small cell networks.

Eric Klumperink is an Associate Professor at Twente University, Enschede, The Netherlands. He teaches Analog and RF CMOS IC Design. His research focus is on Cognitive Radio, Software Defined Radio and Beamforming. Eric serves as Associate Editor for the Journal of Solid-State Circuits. He is a technical program committee member of the International Solid-State Circuits Conference (ISSCC, the most important yearly chip-conference), and the Radio Frequency Integrated Circuits (RFIC). Eric holds 8 patents, authored and co-authored more than 180 international refereed journal and conference papers (see google.scholar or icd.ewi.utwente.nl), and is a co-recipient of the ISSCC 2002 and the ISSCC 2009 "Van Vessem Outstanding Paper Award". Many of his papers published during the last decade focus on software radio and cognitive.

Petri Mähönen is currently a full professor of Networked Systems at the RWTH Aachen University. He joined RWTH Aachen University in 2002 as Ericsson endowed chair. Before that he was a professor and research director at the Centre for Wireless Communications at the University of Oulu, Finland. He has worked and studies in the USA, Finland, Germany, and the UK. In 2006 he was awarded Telenor Prize on his contributions to mobile communications research.  He served as a general chair of IEEE DySPAN in 2011 and as a TPC--‐chair in 2010. His research interests include high efficiency wireless communications systems, ultra dense networks, cognitive wireless networks, spatial statistics, and embedded intelligence in IoT context.

Janne Riihijärvi works as a senior research scientist in the Institute for Networked Systems at RWTH Aachen University. Before joining RWTH he worked in a variety of research projects on wireless networks at VTT Electronics and at the Centre for Wireless Communications at University of Oulu. His current research interests are in applications of techniques from spatial statistics and stochastic geometry on characterization of wireless networks, embedded intelligence in general, and design of architectures and protocols for large scale Heterogeneous networks.

Nelson Pollack is a recognized radio frequency  (RF) spectrum management expert with unique technical and regulatory expertise and experience at the DOD, national, and international levels of spectrum management.  Mr. Pollack spent the majority of his federal career in leadership positions at the Air Force Frequency Management Agency (AFFMA).He joined AFFMA in 1981 and represented the Air Force on the Technical Subcommittee (TSC) of the federal-level Interdepartment Radio Advisory Committee (IRAC). Highlights of his TSC tenure include leading the development of the technical requirements and policy for Federal use of non‐licensed RF devices, and chairing the TSC Necessary Bandwidth Working Group that developed formulas for quantifying the necessary bandwidth of advanced federal RF modulations and waveforms. He served as the US member of the NATO Technical Working Group, responsible for analyses of electromagnetic compatibility of advanced Allied tactical communication systems, as well as the generation of technical a standards for NATO spectrum-dependent systems.  In 1991, Mr. Pollack was promoted to the position of AFFMA Technical Director, responsible for the technical content of all national‐level AF spectrum‐related policies and analyses.
Mr. Pollack served as the AFIRAC member, where he articulated and defended AF Spectrum interests at the National level and generated the AF response to the 1992 and 1997 congressionally mandated spectrum reallocations.
At the international level policy and technical level, he coordinated and developed the Air Force position for the 2003 World Radio Communication Conference (WRC--‐03) and attended WRC--‐03 as a credentialed US delegate. After retirement from federal service in 2004, he formed his own company, Spectrum Analytics (SA), LLC, to provide specialized spectrum regulatory and technical consulting services to the federal government and US defense industry. SA, LLC’s current projects include generating technical and regulatory spectrum supportability risk assessments (SSRAs) for military spectrum--‐dependent systems such as WIN--‐T, Radio Frequency Identification (RFID), Rifleman Radio, EPLRS--‐ eXtended Frequency, and the Combined Data Link (CDL). Additionally, SA, LLC presents tutorials on national and international spectrum processes to a variety of federal and private sector clients. Mr. Pollack has an MSEE from Johns Hopkins University, with a specialization in radar and communication systems.

Michael Marcus is a native of Boston and received S.B. and Sc.D. degrees in electrical engineering from MIT. Prior to joining the FCC in 1979, he worked at Bell Labs on the theory of telephone switching, served in the U.S. Air Force where he was involved in underground nuclear test detection research, and analyzed electronic warfare issues at  the Institute for Defense Analyses.  At  FCC his work focused on proposing and Developing  policies for cutting edge radio technologies such as spread spectrum/CDMA And millimeterwaves. Wi--‐Fi is one outcome of his early leadership. The total amount of spectrum he proposed for unlicensed use and directed the drafting of implementing rules was 8.234 GHz.  He also participated in complex spectrum sharing policy formulation involving rulemakings such as ultrawideband and MVDDS.
Awarded a Mike Mansfield Fellowship in 1997, he studied the Japanese language and spent at year at the FCC’s Japanese counterpart.  He retired from FCC in March 2004 after servicing a senior technical advisor to the Spectrum Policy Task Force and codirecting the preparation of the FCC’s cognitive radio rulemaking. Immediately after retirement he lived in Paris, France  for 3 years, consulting for US and European clients. In 2006 he was appointed Special Advisor to Mrs. Viviane Reding, European Commissioner for Information Society & Media. He is now Director of  Marcus Spectrum Solutions LLC, an independent consulting firm based in the Washington DC area and focusing on wireless technology and policy.  He is also Adjunct Professor of  Electrical and Computer Engineering at  Virginia Tech and the 2011--‐2013 chair of the IEEE-USA Committee on Communications Policy.  He was recognized as a Fellow of the IEEE “for leadership In the development of spectrum management policies”, received in 1994 IEEE-USA’s first Electrotechnology Transfer Award, and received in 2013 the IEEE ComSoc Award for Public Service in the Field of Telecommunications "For pioneering spectrum policy initiatives that created modern unlicensed spectrum bands for applications that have changed our world."

Tom Rondeau is the maintainer and lead developer for the GNU Radio project. He works as a consultant through Rondeau Research and specializes in wireless system design, signal processing development, and software management and system architecture for software radios. Tom also works with the University of Pennsylvania as a visiting researcher exploring the areas of deployable, multi-standard software radio platforms. Tom holds a Ph.D. from Virginia Tech in Electrical Engineering, graduating in 2007. His Ph.D. dissertation on cognitive radio received the Council of Graduate School's Distinguished Dissertation for Math, Science, and Engineering. His research interests span areas of communications theory, signal processing, and software design, which are all a part of his larger interests in software and cognitive radios.

Matt Ettus is a core contributor to the GNU Radio project, a free framework for Software Radio, and is the creator of the Universal Software Radio Peripheral (USRP). In 2004, Matt founded Ettus Research to develop, support and commercialize the USRP family of products. Ettus Research was acquired by National Instruments in 2010, and Matt continues as its president. USRPs are in use in over one hundred countries for everything from cellular and satellite communications to radio astronomy, medical imaging, and wildlife tracking. In 2010, the USRP family won the Technology of the Year award from the Wireless Innovation Forum. In the past Matt has designed Bluetooth chips, GPS systems, and high performance microprocessors. Before that, he received BSEE and BSCS degrees from Washington University and an MSECE degree from Carnegie-Mellon University. In 2011, Matt was named an eminent member of Eta Kappa Nu. He is based in Mountain View, CA.